I love the vibe. If this turned into a bigger game, I think it would be amazing if typing runes in the overworld could be used for secrets!
One thing I think could be improved is, once you know the controls of the runes, the underlying puzzles aren't usually very interesting. "Go through this, don't touch that", it's a bit simple and tedious. I liked the 'CC' ban because it made me think a little bit more about what I was doing. More mechanics and constraints would be great.